Hi Hal,
I guess you know this but...
> I wasn't considering refclocks to be "core" in that context. Got a better
> word?
> Have you found any similar code that isn't in one of the refclocks?
ntp_loopfilter.c used to have code that restricted the months for
leap seconds. The new core ntpd code doesn't do this check, though
if you have an up-to-date leapseconds file, it will veto bad
suggestions.
David.